Chinese Kangxi famille-verte porcelain has very refined paste producing a fine grained porcelain and the glaze tends to be thin, with a luminous and slightly blue glaze whereas the glaze on the 19th century copies are often thicker and very greyish in comparison.However, there are exceptions to the rule) Towards the end of the Kangxi period famille-verte porcelain gave way to porcelain with new colours including, pink (the primary colour in famille-rose) opaque yellow, and opaque lime-green and opaque turquoise.
Fluorescamine is a spiro compound that is not fluorescent itself, but reacts with primary amines to form highly fluorescent products. It hence has been used as a reagent for the detection of amines and peptides. 1-100 Âµg of protein and down 10pg protein can be detected.
1. fluorescein-a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed).